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Difference between revisions of "Melanocytic lesions"
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→Blue nevus: +variants
(→Blue nevus: +abbrev.) |
(→Blue nevus: +variants) |
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*Lentil-shaped (ovoid) nests between collagen bundles. | *Lentil-shaped (ovoid) nests between collagen bundles. | ||
*Mix of spindle or dendritic or epithelioid cell morphology. | *Mix of spindle or dendritic or epithelioid cell morphology. | ||
Notes:<ref name=Ref_Derm457>{{Ref Derm|457}}</ref> | |||
*No epidermal component. | |||
*May be assoc. with a hair follicle. | |||
DDx: | |||
*[[Dermatofibroma]] - esp. amelanotic BN. | |||
*[[Malignant melanoma]]. | |||
*[[Clear cell sarcoma]]. | |||
Images: | Images: | ||
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*[http://commons.wikimedia.org/wiki/File:Blue_nevus_-_very_low_mag.jpg Blue nevus - very low mag. (WC)]. | *[http://commons.wikimedia.org/wiki/File:Blue_nevus_-_very_low_mag.jpg Blue nevus - very low mag. (WC)]. | ||
*[http://commons.wikimedia.org/wiki/File:Blue_nevus_-_intermed_mag.jpg Blue nevus - intermed. mag. (WC)]. | *[http://commons.wikimedia.org/wiki/File:Blue_nevus_-_intermed_mag.jpg Blue nevus - intermed. mag. (WC)]. | ||
====Variant of blue nevus==== | |||
Several histologic variants:<ref name=Ref_Derm457>{{Ref Derm|457}}</ref> | |||
*Sclerosing blue nevus - has stromal fibrosis. | |||
*Amelanotic blue nevus - may be confused with a [[dermatofibroma]]. | |||
*Epithelioid blue nevus. | |||
*Cellular blue nevus. | |||
==Cellular blue nevus== | ==Cellular blue nevus== | ||